Takahiro Endo1, Shota Toyoshima2, Koremasa Hayama1, Tadashi Terui3, Yoshimichi Okayama4. 1. Allergy and Immunology Research Project Team, Research Institute of Medical Science, Tokyo, Japan; Center for Allergy, Nihon University Itabashi Hospital, Tokyo, Japan; Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan. 2. Allergy and Immunology Research Project Team, Research Institute of Medical Science, Tokyo, Japan; Center for Allergy, Nihon University Itabashi Hospital, Tokyo, Japan; Center for Medical Education, Nihon University School of Medicine, Tokyo, Japan. 3. Center for Allergy, Nihon University Itabashi Hospital, Tokyo, Japan; Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan. 4. Allergy and Immunology Research Project Team, Research Institute of Medical Science, Tokyo, Japan; Center for Allergy, Nihon University Itabashi Hospital, Tokyo, Japan; Center for Medical Education, Nihon University School of Medicine, Tokyo, Japan. Electronic address: okayama.yoshimichi@nihon-u.ac.jp.